The normal distribution may be used to approximate the binomial distribution when:

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1 + 18 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

The normal distribution may be used to approximate the binomial distribution when:

The number of trials n is large

The probability of success p is close to 0 and 1

The probability of success p is close to 1/2

Both (The number of trials n is large) and (The probability of success p is close to 1/2)